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By certification 
Items
Standard
Appearance
White powder
Specific Rotation [20/D]
(C=4 in methanol)
-22.0 to -26.0
State of Solution (Transmittance)
Not less than 95.0%
Heavy Metals (Pb)
Not more than 20 PPM
Arsenic (As2O3)
Not more than 2 PPM
Loss on Drying
Not more than 0.50%
Residue on Ignition
Not more than 0.3%
Assay
97.5% to 102.5%
Standard
Appearance
White powder
Specific Rotation [20/D]
(C=4 in methanol)
-22.0 to -26.0
State of Solution (Transmittance)
Not less than 95.0%
Heavy Metals (Pb)
Not more than 20 PPM
Arsenic (As2O3)
Not more than 2 PPM
Loss on Drying
Not more than 0.50%
Residue on Ignition
Not more than 0.3%
Assay
97.5% to 102.5%
